‘Tamcot Luxor' cotton (Gossypium hirsutum L.) was developed in the Multi-Adversity Resistance (MAR) Genetic Improvement Program and released in March 1999 by the Texas Agricultural Experiment Station. The established MAR techniques and procedures utilize seed, seedling, and plant screening and selection in the laboratory and greenhouse in the fall and winter, followed by an extensive annual four-stage field testing and evaluation at 10 locations throughout Texas. These procedures make it possible to identify superior cotton germplasm with simultaneous genetic gains for resistance to pests (insects and plant pathogens) and abiotic stresses in addition to increased yield potential, earliness, and fiber and seed quality (Bird 1982; El-Zik and Thaxton 1989).